Originally Posted by mymiles2go

Tip #1: Changing Status Levels
If you change status levels (going from Premier to Premier Exec, etc), it takes about 2-3 days for it to become effective in the system. At that point you MUST call back United and have them "re-enter" your MP number into any future PNR's (Records/Travel itins) that you have for the system to reflect your new status level.

Update: You no longer have to do this. Your status will be reflected in your PNR within 2-7 days (seems like there is a weekly sweep, didnt figure out which day). Your BPs will then print with your status irregardless of when the reservation was made. HOWEVER, if you requested a 500 miler upgrade BEFORE your status changes, you must have it backed out and reentered in order to be allowed to clear at your new window (can't do online AFAIK). If you are lucky the CSR may clear you right there on the phone to be nice